Finding the Fourth Proportional to 71,796.64, 99,077.04 and 39,964.48

Step by Step Solution

1. Step 1: Write the proportion equation
   71,796.64 : 99,077.04 = 39,964.48 : x
2. Step 2: Convert to fraction form
   71,796.64/99,077.04 = 39,964.48/x
3. Step 3: Cross multiply
   71,796.64x = 99,077.04 × 39,964.48
4. Step 4: Simplify right side
   71,796.64x = 3,959,562,383.54
5. Step 5: Solve for x
   x = 3,959,562,383.54/71,796.64
6. Step 6: Final answer
   x = 55,149.69